We need to be moving to a model where activists demand "no representation without conversation," said Zeynep Tufekci in a discussion about privacy, social media censorship, hashtag activism and global youth protests at the South by Southwest festival in Austin.

Moreno Veloso's father, Caetano Veloso, is a beloved musician and political activist in his native Brazil. But Moreno is carving out a space of his own in the music world, and is now out with his first studio album in 13 years.

Scientists say a girl born with HIV two-and-a-half years ago appears to have been cured. Though the apparent breakthrough is limited to one infant case, the news may give hope to the millions of people living with the HIV virus around the globe.

Friday's release of a major UN report on climate change shows scientists are about as sure as they could possibly be that global warming is real, and that humans are in large part responsible. And yet denial of the crisis persists.

Across Africa, many HIV-positive women would like to have children, but they face a dilemma: How can they become pregnant without putting their partners at risk? Dr. Okeoma Mmeje, an ob-gyn at the University of Michigan, offers an inexpensive solution.

After winning Major League Baseball's home run contest this week, Cuban-born Yoenis Cespedes was interviewed by ESPN's Pedro Gomez. Gomez was blasted by many on Twitter for speaking Spanish. Host Marco Werman speaks with Gomez about the angry reaction.